Help with my seadoo gti se

[Amitco94]

I have a seadoo gti 2018 and have 2 problems with it
I had a problem with the air sensor that cause me problem with ibr i changed it but after that i noticed that i cant go over 6100 rpm and also when i realese the throttle I hear stuttering or like a tremor from the jetski
When i disconnect the air sensor everything ok and i dont hear anything but still cant go over 6100rpm
Changed my wearing changed plugs and coils
I really dont know that to do

 

[Amitco94]

I didnt write it but i dont know how he drive before because i just bought it

 

[Amitco94]

Replaced the fuel pump and his filters and now with the sensor connected the jet ski shuts of if i dont hold the gas and without it can reach over 6200 rpm any suggestion ?